i bought memory on ebay too. but i wouldnt do it again. I dont know if what i am saying is right but i bought 512mb p133 and i had some probs, so it ook it out and used the old memory a 128mb pc133 and it worked fine straightaway. all error messages went away on first bootup. so eventually when i managed to get it to bootup with the 512mb - by reseting it until it worked- i tested it with Norton and it said that there was an error with it. so id try and test ur memory sith some sort of prog. and see what happens.